Farm Equipment - 426 cam bearings?

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426 cam bearings?

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=204301
Printed Date: 25 Nov 2024 at 10:38pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 426 cam bearings?

Posted By: SteveM C/IL
Subject: 426 cam bearings?
Date Posted: 25 Nov 2024 at 6:30pm

Does the 426 engine suffer the same as a 226 regarding camshaft bearings getting worn and a loss of oil pressure? I would guess probably but don't know.

Replies:

Posted By: DrAllis
Date Posted: 25 Nov 2024 at 6:37pm

Well, kind of, but I've never had to replace cam bearings on any 426 for low oil pressure. They are pressure lubed, unlike the 301 that are gravity fed oiling from the rocker arms. The 201/226's have a hollow camshaft that is the main oil galley. None of the newer engines are like that. Your oil pressure should be 35 to 55 psi at full throttle with hot oil working in the field. 45 psi is pretty usual. 35 might have me a bit concerned. 15W-40 oil.

Posted By: SteveM C/IL
Date Posted: 25 Nov 2024 at 7:28pm

Well,about 42 hot working hard so I'll just live with it. 15w40